PHP implementation of encryption and decryption processing class _php skills

The examples in this article describe the cryptographic decryption processing classes implemented in PHP. Share to everyone for your reference, specific as follows:

<?php/*=========================================================== = Copyright agreement: = GPL (The GNU general public LICENSE V Ersion 2, June 1991) =------------------------------------------------------------= File name: cls.sys_crypt.php = Summary: PHP Plus Secret decryption Processing class = Version: 1.0 = reference: Discuz Forum's passport related function =------------------------------------------------------------= Last Updated Date:
 2007-12-09 ============================================================*/class Syscrypt {private $crypt _key;
 Constructor public Function __construct ($crypt _key) {$this-> crypt_key = $crypt _key;
  The Public Function Php_encrypt ($txt) {srand (double) microtime () * 1000000);
  $encrypt _key = MD5 (rand (0,32000));
  $ctr = 0;
  $tmp = ';
   for ($i = 0; $i <strlen ($txt); $i + +) {$ctr = $ctr = = strlen ($encrypt _key)? 0: $ctr; $tmp. = $encrypt _key[$ctr].
  ($txt [$i]^ $encrypt _key[$ctr + +]);
 Return Base64_encode (Self::__key ($tmp, $this-> crypt_key)); The Public Function Php_decrypt ($txt) {$txt = Self::__key (base64_decode ($txt), $this-> Crypt_key);
  $tmp = ';
   for ($i = 0; $i < strlen ($txt); $i + +) {$MD 5 = $txt [$i];
  $tmp. = $txt [+ + $i] ^ $MD 5;
 return $tmp;
  Private Function __key ($txt, $encrypt _key) {$encrypt _key = MD5 ($encrypt _key);
  $ctr = 0;
  $tmp = ';
   for ($i = 0; $i < strlen ($txt); $i + +) {$ctr = $ctr = = strlen ($encrypt _key)? 0: $ctr;
  $tmp. = $txt [$i] ^ $encrypt _key[$ctr + +];
 return $tmp;
 The Public Function __destruct () {$this-> crypt_key = null;
 }//Execute code $SC = new Syscrypt (' phpwms '); $text = ' abc10000008910000000990099hh '; Need to encrypt the data print ($SC-> php_encrypt ($text));
 Encrypted print (' <br> '); Print ($SC-> php_decrypt ($sc-> php_encrypt ($text)));

 Decryption?>

About encryption and decryption interested friends can also refer to the site online tools:

Password Security online detection

High Strength Password Generator

MD5 Online Encryption Tool

Thunderbolt, Express, Cyclone URL encryption/decryption tool

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I hope this article will help you with the PHP program design.